Woooo this thing is just explosing! It competely otpimized web page to dark mode. Unlike any addon before, it've exceled.

First impression was GREAT!!! hope so in my daily basis dont slow down my Beautiful Firefox because Im going to report it for now you need to try it

This add-on could be really good, but it consummes all memory resoueces on my desktod and slows Firefox horribly. Ir can take over 10 seconds to stabilize, and then it leaves no memory available for the computer to work. I have to be constantly cleaning up the memorumemory. I'll have to remove it with greaqt regret. Also, the settings file import function does no wirk for Firafex.

Has almost all the features one could expect

I transitioned from Dark Reader to Midnight Lizard. The customization is much easier.

My biggest wish is to change the PDF color's in Firefox's built-in viewer.

So far this is the most effective dark mode add-on I have used (switched from Dark Reader due to it frequently defaulting my FF Theme), though maybe not the most efficient with some sites/pages have some CPU load runaway (CPU used i7 4770k).

This addon does magic. But it's resource demanding.